Multiple-chamber pneumatic tire.



I II/IULTIPLE CHAMBER .PYNEUMATIC TIRE.

TURNER.'

APPLICATION FILED JULY 28.1914.

2 SHEETS-SHEET I.

envi/humus I. W. TURNER.

MULTIPLE CHAMBER PNEUMATIC TIRE.

APPLICATION FILED JULY 28.19I4.

Patented sept 28, 1915.

2 SHEETS-SHEEI 2.

IM/vanto@ Jsgse@ MTai/We @Home-43 JESSEE WEBB TURNER, OF KIRKSVILLE, MISSOURI.

MULTIPLE-CHAMBER PNEUMATIC TIRE.

Specification of Letters Patent.

Patented Sept. 28, 1915.

Application filed July 28, 191,4. Serial No. 853,739.

To all whom it may concern Be it known that I, J Essen iV. TpRNER, a citizen ofthe United States, residing at y Kirksville, Adair county, Missouri, have iniallow of the necessary movement.

to the great number of bags or chambers Vented a certain new and useful Multiple- Chamber Pneumatic Tire, of which the following is a specification.

My invention relates to pneumatic tires of the multiple chamber type.

The object of the invention is to provide a tire of the typenamed with a multiplicity, that is to say, alarge number of, separate and independent bags or chambers arranged end toend`within the space between the demountable rim and tire-casing; each bag or chamber being provided with a filling neck arranged to .permit a longitudinal sliding movement of the bags or chambers around the' rim so that in the event of one bag or chamber being punctured or colla'psed the other bags of the series will all move bodily toward the space occupied bysaid collapsed bag or chamber and cause the said space to be filled.I

v'The particular manner of affording such longitudinal play at present employed by meis to provide the bags or chambers with flexible necks or filling tubes of sufficient length beyond the inner side of the rim to Owing employed the amount of movement necessary to the individual bags or compartments to permit them to-close up the gap formed by a collapsed bag is very slight las is also the endwise expansion of the bags. For instance,`there are t wentytwo bags or compartments shown in the drawing, and were the tire twenty-two inches in diameter each b ag would., in practice. be about three inches long. I am aware that multi-chambered pneumatic tires in which every bag or chamber has its own filling tube or neck, are old, but Iam not aware that such chambers were entirely sepa rate and independent one of the other and of the demountable rimani. casing, with their filling necks so arranged with respect to the rim and casing as to allow endwise sliding movement of the bags or chambers to close the gap due to the collapsing of one of said bags or chambers, and this is the essential feature of my invention. The yabove object I accomplish by the construction shown in the accompanying draw ing, in which Figure 1 is a sectional side elevation of a tire provided with my improvement.; all of the bags or chambers being inflated. Fig. 2 is a similar viewshowing one of tlie'bags or chambers collapsed and the space closed by the sliding up of the remaining bags or chambers. Fig. 3 is a cross-section through the tire on line 3 3, Fig. 1. Fig. 4 is a perspective of one of the individual bags or compartments. l

The demountable rim 1, and the outer casing 2, may be of the usual or any desired types. The rim 1 is provided, as shown, with an annular series of twenty-two recesses 3 in its inner face and'from the bases of these recesses threaded perforations -l extend; such perforations and recesses lying half way between the side edges of the rim andso register with the annular open space between the edges of the outer casing 2.

The pneumatic bags or chambers 6, are placed end to end within the casing 2, and every bag has a flexible elongated tube or neck 7 terminating in an air valve S, screwed in the perforations l. The caps 9 are screwed upon the exposed ends of' the air 'alves 8, and' lie within the recesses 3. flush with the inner face of the rim'. The tire as a whole including4 the demountable rim l may be easily passed upon any of the modern wheels adapted 'for demountable tires, as the inner periphery of the rim 1 has no projecting parts. owing to the air valves 8` and then' caps 9 lying flush therewith. Any

suitable form of air. valve may be used and the series of bagsmay be inflated simultaneously by any suitable multi-nozzle device or the bags may be inflated separately.

The bags or compartments 6, are wholly independent one of the other, not being ce! mented together or otherwise connected, and they. are wholly disconnected from casing 2 and from the rim 1,-except the loose connection afforded by the elongated flexible filling necks 7. The necks 7 are reinforced in any suitable manner where they yjoin the bags 6; a cloth reinforce 10 being shown.

,Vhen the bags properly inflated they engage the casing and suppcf't it just as do the continuous inner tubes now commonly employed, sincetheA or compartments 6, are all.

But on one of the bags the weight imposed on the tire tending to v I flatten it and in tui-n flatten and separate the 'bags'. This tendency to flatten and separate the bags also tends to move them instantly endwise until the two bags next to the collapsed one fill the gap caused thereby and as there are so many bags a slight longitudinal movement only of the others is necessary to cause the proper readjustment of the series. Of course, there will be a flattening of the t-ire casing orouter tube', 'but it will not be suliicien't to preventithe tire acting properly until the machine may be gotten toa place wherea new bag may be inserted or v,

the oldone repaired. With a Vcontinuous innertube all the air would escape and the tire-collapse while in the example shown dnly one-twenty-second'of the total amount of air would escape andthe lreadjustment of the Iremaining amount would be so quickly effected as to not interfere with the proper operation of lthe tire.

bags have freedom of movement where the lilling tubes pass through the rim as a rigid connect-10114between-the bags and rnn at the fillingtubes would 4render the objects sought' by me impossible.

Furthermore, it is lobvious that.. serious blow-outs of the tire are rendered improbable if not impossible since no one bag containsa sufiicicnt volume of 'compressed air to produce such va. Vresult.

The explosion' of a large gas bag in a balloon casing would obviously rip the casing' tovpiecesfbut were the casing filled with a large number of very small closely contact-v ing gas bags', the lexplosion of one of them v would not affect the casing, since the small volume of gas contained in one of the small bags would find room to expand and lose itsV force without lrupturing the outer casing,

As before stated, it is essential that the while the explosion of all the gas bags would varranged series of valve openings or ports therethrough, of a circular serles of sepa-y rate and independent pneumatic bags placed end'to end within thetire casingvand suflicient'in number to permit the closing of a gapA when formed' by a collapsed bag.4 and filling tubes each havingits o\vn`i1 1di vidual air inlet valve mounted' in the rim-topening or port,l said tubesloosely connecting the individualbags with 'the rimto thereby permit -al bodily endwse movement withinthe casing. l I

2. ln' a pneumatic tire, a rim having a lcircular series 'of valve .openings theres through, al casing mounted onthe rimfa seriesjof separate and independent air bags of the bags arranged end to end. within. the casing and y i eachlhalvving'an elongated filling tube or neck terminating in an air inlet valve removably mounted in one of the rim apertures; said valves at Atheir outer ends being adapted to connect with a compressed air supply.

I In testimony whereofl I. affix my signature in'pr'esenoe of two witnesses.

. Essen .WEBB TURNER i Vitnesses:A

ANNIE E.v TURNER, I FnYETrnH. V'Immung1 'f 

